alSynAllocVoice

lib/src/unknown_0C9C90.c

@@ -157,7 +157,6 @@ void alEvtqNew(ALEventQueue *evtq, ALEventListItem *items, s32 itemCount){
     }
 }
 
-//GLOBAL_ASM("lib/asm/non_matchings/unknown_0C9C90/alSynAddPlayer.s")
 void alSynAddPlayer(ALSynth *drvr, ALPlayer *client)
 {
     OSIntMask mask = osSetIntMask(OS_IM_NONE);
@@ -169,5 +168,113 @@ void alSynAddPlayer(ALSynth *drvr, ALPlayer *client)
     osSetIntMask(mask);
 }
 
+#if 1
 GLOBAL_ASM("lib/asm/non_matchings/unknown_0C9C90/_allocatePVoice.s")
-GLOBAL_ASM("lib/asm/non_matchings/unknown_0C9C90/alSynAllocVoice.s")
+#else
+s32 _allocatePVoice(ALSynth *drvr, PVoice **pvoice, s16 priority)
+{
+    ALLink      *dl;
+    PVoice      *pv;
+    s32         stolen = 0;
+    
+    if ((dl = drvr->pLameList.next) != 0) { /* check the lame list first */
+        *pvoice = (PVoice *) dl;
+        alUnlink(dl);
+        alLink(dl, &drvr->pAllocList);        
+    } else if ((dl = drvr->pFreeList.next) != 0) { /* from the free list */
+        *pvoice = (PVoice *) dl;
+        alUnlink(dl);
+        alLink(dl, &drvr->pAllocList);        
+    } else { /* steal one */
+        for (dl = drvr->pAllocList.next; dl != 0; dl = dl->next) {
+            pv = (PVoice *)dl;
+
+            /*
+             * if it is lower priority and not already stolen, keep it
+             * as a candidate for stealing
+             */
+            if ((pv->vvoice->priority <= priority) && (pv->offset == 0)) {
+                *pvoice = pv;
+                priority = pv->vvoice->priority;
+                stolen = 1;
+            }
+        }
+    }
+    
+    return stolen;
+}
+#endif
+
+//GLOBAL_ASM("lib/asm/non_matchings/unknown_0C9C90/alSynAllocVoice.s")
+s32 alSynAllocVoice(ALSynth *drvr, ALVoice *voice, ALVoiceConfig *vc)
+{
+    PVoice  *pvoice = 0;
+    ALFilter *f;
+    ALParam *update;
+    s32 stolen;
+    
+#ifdef _DEBUG
+    /* need two updates if voice is stolen */
+    if (drvr->paramList == 0) {
+        __osError(ERR_ALSYN_NO_UPDATE, 0);
+        return 0;
+    } else if (drvr->paramList->next == 0) {
+        __osError(ERR_ALSYN_NO_UPDATE, 0);
+        return 0;
+    }
+#endif    
+
+    voice->priority     = vc->priority;
+    voice->unityPitch   = vc->unityPitch;
+    voice->table        = 0;
+    voice->fxBus        = vc->fxBus;
+    voice->state        = AL_STOPPED;        
+    voice->pvoice       = 0;
+
+    stolen = _allocatePVoice(drvr, &pvoice, vc->priority);
+        
+    if (pvoice) {    /* if we were able to allocate a voice */
+
+        f = pvoice->channelKnob;            
+            
+        if (stolen) {
+                
+            pvoice->offset = 512;
+            pvoice->vvoice->pvoice = 0; /* zero stolen voice */
+                
+            /*
+             * ramp down stolen voice
+             */
+            update = __allocParam();
+            update->delta      = drvr->paramSamples;
+            update->type       = AL_FILTER_SET_VOLUME;
+            update->data.i     = 0;
+            update->moredata.i = pvoice->offset - 64;
+            (*f->setParam)(f, AL_FILTER_ADD_UPDATE, update);
+
+            /*
+             * stop stolen voice
+             */
+            update = __allocParam();
+            if (update) {
+                update->delta  = drvr->paramSamples + pvoice->offset;
+                update->type   = AL_FILTER_STOP_VOICE;
+                update->next   = 0;
+                (*f->setParam)(f, AL_FILTER_ADD_UPDATE, update);
+            } else {
+#ifdef _DEBUG                
+                __osError(ERR_ALSYN_NO_UPDATE, 0);
+#endif
+            }
+
+        } else {
+            pvoice->offset = 0;
+        }
+            
+        pvoice->vvoice = voice;     /* assign new voice  */
+        voice->pvoice  = pvoice;
+
+    }
+
+    return (pvoice != 0);    
+}